PJ2 wrote
In reference to N1, it would have been nice to have had the parameter in the TAM traces so we could see what the N1 was doing during the EPR 1.3 "bloom" as reverse was selected. The fuel flow doesn't change so we could assume neither did the N1 and the "bloom" may mean less than first appears.
The FF is only sampled every 4 seconds - the EPR every second.
FF at 48:25.5 corresponds with an accelerating EPR of 1.13
FF at 48:29.5 corresponds with the final stable EPR of 1.18
FF appears virtually constant because of the sampling rate - but the EPR and ENG VIB give a better picture.
Cheers, TP